package com.pmcc.utils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

/**
 * Created by tomas on 2020/10/11.
 */
public class QRcodeImageUtil {
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    /**
     * 根据字符串生成对应的二维码图片png
     * 大小:200*200
     *
     * content：要转换的内容
     * path：生成的二维码图片的绝对路径
     * filename: 生成的文件名
     */
    public static Boolean buildQuickMark(String content, String path, String filename) throws Exception {
        boolean isTrue = false;
        try {
            BitMatrix byteMatrix = new MultiFormatWriter().encode(new String(content.getBytes(), "iso-8859-1"),
                    BarcodeFormat.QR_CODE, 200, 200);
            String serverFileName = filename+".png";
            String folder = "/gek";
            String fileUrl = folder+"/"+serverFileName;
            String format = "png";
            File file = new File(path,fileUrl);
            if (!file.exists()) {
                file.getParentFile().mkdirs();
                file.createNewFile();
            }
            BufferedImage image = toBufferedImage(byteMatrix);
            if (!ImageIO.write(image, format, file)) {
                throw new IOException("Could not write an image of format " + format + " to " + file);
            }
            isTrue = true;
        } catch (Exception e) {
            isTrue = false;
            e.printStackTrace();
        }
        return isTrue;
    }

    private static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

    public static void main(String[] args) {
        try {
            buildQuickMark("402880f074e99c660174e9a340a21112","d:/usr/local/uploadFile/","402880f074e99c660174e9a340a21112");
        }catch (Exception e){

        }
    }
}
